这种摩擦往往会减慢风的速度，使它们吹散污染物的效率大大降低。
This friction tends to slow the speed of winds, making them far less efficient at dispersing pollutants.
航天飞机重返地球大气层时因有摩擦力而减慢速度。
The force of friction slows the spacecraft down as it re-enters the earth's atmosphere.
物体运动，并向上加速度，因为摩擦力方向斜上，值为这个。
It is moving, so sure, it's going to be accelerated so the frictional force is in this direction, has this value.
你们可以看到,有件事非常值得注意,可以注意到,方向的速度，is，that，the，velocity，in，the，x，direction,在整个轨迹当中-,如果没有空气阻力，也没有摩擦力-,是不会改变的。
Now, when you look at this there is something quite remarkable and the remarkable thing x - throughout this whole trajectory-- if there is no air draft, - if there is no friction-- is not changing.
对机器人的牵引力、运动速度、在不同摩擦系数介质表面上的运动能力、头舱姿态进行了试验。
Experiments are made on locomotion force, velocity, locomotion ability on surfaces with different friction coefficients, and pose of the head cabin.
而镍与APS间的摩擦系数随滑动速度的增大而增大，随载荷的增大而减小。
However, the friction coefficient between Ni and APS increased with sliding velocity increasing and reduced with load increasing.
详细介绍了圆盘式飞剪各主要参数的确定，包括交角、咬入条件、剪刃重叠量、摩擦系数、轧制速度等。
Setting main parameters of disc flying shears are presented in detail. including cut Angle, bite conditions, amount of scissors overlapping, friction coefficient and rolling speed etc.
论文重点分析了车辆运行速度、轮轨摩擦系数、车辆载重、轨道几何不平顺、偏载、轨距大小、车轮踏面形状等因素对脱轨的影响。
The influence of train running speed, wheel-rail friction coefficient, vehicle load, track geometric irregularity, partly load, gauge and the shape of wheel tread on derailment was emphasized.
测量结果表明，在极低速状态下，仪表齿轮齿面间的摩擦系数几乎与齿面间的作用力无关，但随齿面相对滑动速度的增加而线性增加。
Results show that the frictional factor almost has nothing to do with applied forces, but increases linearly with the sliding speed between the tooth faces.
尖锐的、不规则形状的磨粒，摩擦系数、能量消耗、磨损速度都较大。
If grit is sharp anp irregular, the coefficient of friction, consumption of energy and wear speed will be greater.
考察了载荷和速度等可控因素对这种轴承摩擦系数的影响。
The influence of some controllable factors, such as load and speed, on the friction coefficient of the bearing was investigated.
另外，拉深温度的降低，冲压速度的增加，摩擦系数的增大都会使拉深时的最大冲程力增大。
In addition, the decline of the temperature, the raise of the drawing velocity, the raise of the friction coefficient all could lead to the increase of the maximum stroke force.
对于速度边界层提出了相似性解的解析结果，给出了速度分布、边界层厚度、摩擦阻力和水头损失的解析计算表达式。
Calculation formula of velocity distribution, boundary layer thickness, friction force and loss of water head are given out, in accordance with the result from theory analysis of similitude solution.
为解决静摩擦力难以判断的问题，提出了概念判断法、加速度判断法、综合分析法等方法。
It is one of the difficult points of physics teaching to ask the static friction force of solving.
分析了偏心距和旋转对于二次流以及轴向速度分布的影响，同时给出了平均摩擦系数和壁面摩擦力的分布。
Effects of eccentricity and rotation on the secondary flow and maximal axial velocity were analyzed, and the average friction factors and the wall friction distributions were also presented.
试验和分析结果表明，该系统在一定的速度范围内可以有效地测试航行器模型所受摩擦阻力，满足了设计要求。
Experimental and analytical results show that the system can be used to study the friction drag of the vehicle models at certain speed range, which full-fills the design demand.
为提高既有线的运行速度，开发了铸铁合成闸瓦，该闸瓦利用陶瓷粒子来提高摩擦系数。
The composite brake shoe of cast iron is developed to improve the running speed on existing line. The ceramic particles are used in the brake shoe to improve the friction coefficient.
该摩擦力的非线性改变使速度产生变化，导致人们在搭乘液压电梯时产生不舒适感。
This nonlinear change in friction force over a small change in velocity results in uncomfortable feeling when people hitchhike hydraulic lift.
结果表明，模具最高温度随拉拔速度的增加和摩擦系数的增加都是近似线性的增加；
The results show that the maximum temperature of the die has a nearly linear increase with the increase of drawing velocity or the increase of friction coefficient.
建立了摇摆条件下圆管内的层流流动模型，推导出无量纲化的速度表达式，得到摩擦阻力系数关系式。
The model of laminar flow in tubes in rolling motion is established. The dimensionless correlation of velocity is derived, and the correlation of frictional resistance coefficient is also obtained.
作为摄动因素的摩擦力是滑动速度的任意非线性函数。
The sliding friction is an arbitrary nonlinear function of the sliding speed.
主要考虑了摩擦力、空气阻力等因素对弹丸的速度和轨迹的影响。
The effects of frication, air frication on the speed and trajectory of projectiles have been fully considered.
摩擦阻力的变化趋势与速度类似，在产生逆向流处出现局部极小值。
The variation of local friction coefficient is similar to velocity and local minimum value occurred in reverse flow area.
通过数值计算得到了平移断层上滑移位移、速度及摩擦力的分布规律。
The distribution of slip displacement, slip velocity and friction force on the strike slip fault were obtained by numerical simulation.
根据设计要求之制动减速度和制动力分配比，提供摩擦系数计算方法和顺序，用于合理确定台试时的摩擦系数允差。
According to the design requirements of braking deceleration and distribution proportion between braking forces of front and rear wheel, a procedure of calculation for friction factor is provided.
试验发现，摩擦系数随滑动速度的增加而增加，存在临界滑动速度。
It is found that the friction coefficient increases with the increase of sliding velocity, and there is critical velocity.
基于轮胎的魔术公式模型，研究了轮胎在路面的最佳滑移率和最大摩擦系数随汽车速度的动态变化过程。
Based on the tire magic formula model, the dynamic variation process of the tire optimal slip ratio and the maximum friction coefficient on the road with the vehicle velocity is researched.
分析了各种流动参数和几何参数对轴向速度、二次流动、壁面摩擦力、摩擦系数比的影响。
We analyze the effects of the flow parameters and the geometrical parameters on the axial flow, the secondary flow and the friction.
分析了各种流动参数和几何参数对轴向速度、二次流动、壁面摩擦力、摩擦系数比的影响。
We analyze the effects of the flow parameters and the geometrical parameters on the axial flow, the secondary flow and the friction.
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